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United States Patent |
6,204,838
|
Wang
,   et al.
|
March 20, 2001
|
Controlling scrolls of a screen image
Abstract
The present invention discloses a pointing device for scrolling a screen
image. The pointing device comprises a chassis, a housing having an
opening on its top mounted on the chassis, a vertical sensor installed on
the chassis below the opening, a plurality of horizontal sensors installed
on the chassis beside the vertical sensor, and a control stick vertically
installed inside the opening of the housing comprising a top end and a
bottom end. The bottom end of the control stick is in contact with the
vertical sensor whereas the top end of the control stick protrudes from
the opening of the housing and can be horizontally moved within a
predetermined angle with respect to the bottom end of the control stick
serving as its center. The pointing device further comprises a plate
horizontally installed at the bottom end of the control stick with its
bottom side positioned above the horizontal sensors. Horizontal movement
of the top end of the control stick will cause corresponding movement of
the plate which then causes the bottom surface of the plate to trigger at
least one horizontal sensor. The pointing device also comprises a control
device electrically connected to the vertical and horizontal sensors for
detecting vertical movements of the control stick using the vertical
sensor and generating correspondent vertical signals, and detecting
horizontal movements of the control stick using the horizontal sensors and
generating correspondent horizontal signals.
Inventors:
|
Wang; Han Che (Taipei Hsien, TW);
Liu; Shu-Ming (Taipei, TW);
Yen; Hong-Che (Taipei, TW);
Chang; Chen-Ming (Taipei, TW)
|
Assignee:
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Primax Electronics Ltd. (Taipei Hsien, TW)
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Appl. No.:
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082757 |
Filed:
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May 21, 1998 |
Current U.S. Class: |
345/161; 345/163; 345/164; 345/167 |
Intern'l Class: |
G09G 005/08 |
Field of Search: |
345/156,157,159,161,163,164,167,168
|
References Cited
U.S. Patent Documents
5157381 | Oct., 1992 | Cheng | 345/163.
|
5298919 | Mar., 1994 | Chang | 345/167.
|
5446481 | Aug., 1995 | Gillick et al. | 345/157.
|
5530455 | Jun., 1996 | Gillick et al. | 345/156.
|
5771038 | Jun., 1998 | Wang | 345/163.
|
5883619 | Mar., 1999 | Ho et al. | 345/163.
|
Primary Examiner: Shankar; Vijay
Claims
What is claimed is:
1. A pointing device comprising:
a chassis;
a housing having an opening on its top mounted on the chassis;
a vertical sensor installed on the chassis below the opening;
a plurality of horizontal sensors installed on the chassis beside the
vertical sensor;
a control stick vertically installed inside the opening of the housing
having a top end and a bottom end wherein the bottom end is in contact
with the vertical sensor and the top end protruding from the opening of
the housing can be horizontally moved within a predetermined angle with
respect to the bottom end of the control stick as its center;
a plate horizontally installed at the bottom end of the control stick
having a bottom side positioned above the horizontal sensors and a
vertical sliding channel installed at its middle portion wherein the
bottom end of the control stick is slidable and vertically mounted in the
vertical sliding channel of the plate, and wherein when the top end of the
control stick is horizontally moved, the control stick will move the plate
allowing the bottom side of the plate to trigger at least one horizontal
sensor, and when the control stick is depressed downward substantially at
a vertical angle, the bottom end of the control stick will trigger the
vertical sensor and the bottom side of the plate will not trigger the
plurality of horizontal sensors; and
a control device electrically connected to the vertical and horizontal
sensors for detecting vertical movements of the control stick by using the
vertical sensor and generating correspondent vertical signals, and
detecting horizontal movements of the control stick by using the
horizontal sensors and generating correspondent horizontal signals.
2. The pointing device of claim 1 wherein the plate is a circular plate
with the vertical sliding channel installed at its center.
3. The pointing device of claim 2 wherein the circular plate comprises a
half spherical shaped protruding button installed above its center, with
an upper opening of the sliding channel positioned at a top end of the
protruding button, and wherein the housing comprises a half spherical
shaped recess below its opening slidably in contact with the protruding
button of the circular plate, and horizontal movements of the top end of
the control stick will cause movements of the circular plate such that the
protruding button of the circular plate will make correspondent movements
at the half spherical shaped recess below the opening of the housing.
4. The pointing device of claim 3 wherein the plate is constrained between
the opening of the housing and the horizontal sensors to prevent the plate
from moving up and down with the control stick.
5. The pointing device of claim 4 wherein the control stick further
comprises a circular base installed at the bottom end of the control
stick, and wherein the circular plate comprises a correspondent circular
recess installed below its center and mounted on the circular base of the
control stick such that horizontal movements of the top end of the control
stick will move the circular plate through the circular base of the
control stick.
6. The pointing device of claim 1 wherein the vertical sensor or the
horizontal sensor is an on and off switch which, when triggered, causes
the control device to generate vertical or horizontal signals according to
changes in its present state.
7. The pointing device of claim 1 wherein the horizontal or vertical sensor
can be a strain gauge which, when triggered, causes the control device to
generate a correspondent horizontal or vertical signal in proportion to
the force sensed by the strain gauge.
8. The pointing device of claim 1 comprising four horizontal sensors
installed on the chassis in four mutually perpendicular directions of the
vertical sensor for detecting horizontal movements of the control stick.
9. The pointing device of claim 8 wherein when the top end of the control
stick is moved horizontally, the bottom side of the plate will trigger at
most two horizontal sensors.
10. The pointing device of claim 1 wherein the housing comprises a guiding
device installed at its opening for guiding horizontal movement directions
of the control stick.
11. The pointing device of claim 10 wherein the guiding device guides the
control stick to make horizontal movements in eight symmetrical
directions.
12. The pointing device of claim 1 wherein the control device is
electrically connected to a computer which comprises a displaying device
for displaying a screen image and a processor electrically connected
between the displaying device and the control device for controlling
displays of the screen image, and wherein the processor can control
scrolling directions of the screen image according to the horizontal
signals generated by the control device.
13. The pointing device of claim 1 wherein the pointing device is installed
on a computer mouse which comprises a rotatable ball and two optical
sensors electrically connected to the control device for detecting
movements of the ball in two mutually perpendicular directions, and the
control device will generate two-dimensional pointing signals according to
outputs of the two optical sensors.
14. A pointing device for controlling scrolls of a screen image of a
computer, the computer comprising a displaying device for displaying the
screen image and a processor for controlling displays of the screen image,
the pointing device comprising:
a housing having an opening on its top;
a control stick movably installed inside the opening of the housing
comprising a top end and a bottom end, the bottom end of the control stick
comprising a horizontal plate;
a vertical sensor installed inside the housing and below the control stick:
a plurality of horizontal sensors installed inside the housing below the
horizontal plate of the control stick; and
a control device electrically connected between the vertical sensor, the
plurality of horizontal sensors, and the computer for detecting vertical
and horizontal movements of the control stick according to the vertical
sensor and the plurality of horizontal sensors, and generating
correspondent vertical and horizontal signals;
wherein the processor of the computer can control the scrolls of the screen
image according to the vertical and horizontal signals generated by the
control device.
15. The pointing device of claim 14 wherein the pointing device comprises
four horizontal sensors installed in four mutually perpendicular
directions of the bottom end of the control stick, when the processor
receives a horizontal signal generated by the four horizontal sensors, the
processor will detect a movement direction of the control stick according
the horizontal signal and control the image screen to scroll toward the
movement direction.
16. The pointing device of claim 15 wherein the plate further comprises a
vertical sliding channel installed in a middle portion of the plate, and
wherein the bottom end of the control stick is vertically installed inside
the vertical sliding channel of the plate in a slidable manner, a vertical
depression of the control stick will cause the bottom end of the control
stick to slide downward inside the vertical sliding channel of the plate
and cause triggering of the vertical sensor, and the control device can
detect the depressed state of the control stick by using the vertical
sensor and generate a correspondent vertical signal.
17. The pointing device of claim 16 wherein when the processor receives the
vertical signal and the horizontal signal generated by the four horizontal
sensors at the same time, the processor can determine a movement direction
of the control stick according to the horizontal signal and control the
image screen to scroll toward the movement direction at an increased
speed.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a computer pointing device, and more
particularly, to a pointing device for controlling scrolls of a screen
image.
2. Description of the Prior Art
A traditional pointing device commonly uses a rolling wheel rotatable along
a front-and-rear direction to scroll a screen image. It comprises a
vertical sensor installed below the rolling wheel for detection of its
movements. The rolling wheel comprises a chassis installed on a top side
of a mouse and can be clicked to trigger the vertical sensor. The vertical
sensor is used for generating control signals such as a page mode
scrolling command or a line mode scrolling command. However, the rolling
wheel has a very complicated mechanical and electrical interface.
For continuous scrolling of the screen image, the user must repeatedly
rotate the rolling wheel. In addition, the rolling wheel must be pressed
down in order to trigger a different control mode. The action of
simultaneously pressing down the rolling wheel while repeatedly moving it
in order to trigger a different control mode is a difficult action to
perform for the user.
SUMMARY OF THE INVENTION
It is therefore a primary objective of the present invention to provide a
pointing device for scrolling a screen image to solve the above mentioned
problems.
In a preferred embodiment, the present invention comprises a pointing
device comprising:
a chassis;
a housing comprising an opening on its top mounted on the chassis;
a vertical sensor installed on the chassis below the opening;
a plurality of horizontal sensors installed on the chassis beside the
vertical sensor;
a control stick vertically installed inside the opening of the housing
comprising a top end and a bottom end wherein the bottom end is in contact
with the vertical sensor, the top end protrudes from the opening of the
housing and can be horizontally moved within a predetermined angle with
respect to the bottom end of the control stick as its center;
a plate horizontally installed at the bottom end of the control stick
comprising a bottom side positioned above the horizontal sensors wherein
horizontal movement of the control stick will move the plate allowing the
bottom side of the plate to trigger at least one horizontal sensor; and
a control device electrically connected to the vertical and horizontal
sensors for detecting vertical movements of the control stick using the
vertical sensor and generating correspondent vertical signals, and
detecting horizontal movements of the control stick using the horizontal
sensors and generating correspondent horizontal signals.
It is an advantage of the present invention that the pointing device has a
very simple structure and a very compact size. Moreover, when continuously
scrolling the screen image, the control stick needs only to be moved in
one direction. Used in this manner, the device creates comfort for the
user through its ease of use.
This and other objectives of the present invention will no doubt become
obvious to those of ordinary skill in the art after having read the
following detailed description of the preferred embodiment which is
illustrated in the various figures and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a pointing device and a computer according
to the present invention.
FIG. 2 is a perspective view of the pointing device shown in FIG. 1.
FIG. 3 is a component diagram of the pointing device shown in FIG. 2.
FIG. 4 is a sectional view along line 4--4 of the pointing device shown in
FIG. 2.
FIG. 5 is a function block diagram of the mouse shown in FIG. 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Please refer to FIG. 1. FIG. 1 shows a pointing device 20 installed on a
mouse 10. The mouse 10 is electrically connected to a computer 12
according to the present invention and comprises a rotatable ball 18
installed on its bottom side. The computer 12 comprises a monitor 14 for
displaying a screen image 15, and a processor 16 electrically connected
between the monitor 14 and the mouse 10 for controlling displays of the
screen image 15.
Please refer to FIG. 2 to FIG. 4. FIG. 2 is a perspective view of the
pointing device 20. FIG. 3 is a component diagram of the pointing device
20. FIG. 4 is a sectional view along line 4--4 of the pointing device 20
in FIG. 2. The pointing device 20 comprises a chassis 22, a housing 24, a
vertical sensor 28, four horizontal sensors 30, a control stick 32, and a
circular plate 40.
The housing 24 is mounted on the chassis 22 and has an opening 26 on its
top. The vertical sensor 28 is installed on the chassis 22 below the
opening 26. The four horizontal sensors 30 are installed on the chassis 22
and positioned in four mutually perpendicular directions of the vertical
sensor 28. The control stick 32 is vertically installed inside the opening
26 of the housing 24. It comprises a top end 34 protruding from the
opening 26 of the housing 24, and a bottom end 36 in contact with the top
of the vertical sensor 28. The top end 34 of the control stick is moved
horizontally with respect to the bottom end 36 within a predetermined
angle, the bottom end 36 of the control stick 32 is being the center of
reference.
The circular plate 40 is horizontally installed on the bottom end 36 of the
control stick 32. It comprises a bottom side 42 positioned above the four
horizontal sensors 30. When the top end 34 of the control stick 32 is
moved horizontally, the circular plate 40 will be driven causing the
bottom side 42 of the plate 40 to trigger one or two adjacent horizontal
sensors 30. The plate 40 further comprises a vertical sliding channel 44
positioned at a center of the plate 40. The vertical sliding channel 44 is
installed on the control stick 32 and is slidable along a vertical
direction. When the control stick 32 is vertically depressed, the bottom
end 36 of the control stick 32 will trigger the vertical sensor 28 while
the sliding channel 44 will temporarily separate the plate 40 from the
control stick 32 thereby preventing the four horizontal sensors 30 from
being triggered.
The housing 24 comprises a guiding device 38 installed on its opening 26
for guiding horizontal movement directions of the control stick 32. In
this embodiment, the guiding device 38 comprises eight grooves positioned
at eight symmetrical directions so that the control stick 32 can only be
pushed toward one of these eight directions.
The circular plate 40 comprises a half spherical shaped protruding button
46 installed above its center, with an upper opening of the sliding
channel 44 positioned at the top end. The housing 24 comprises a half
spherical shaped recess 48 installed below its opening 26. The protruding
button 46 of the circular plate 40 is in contact with the recess 48 below
the opening 26 of the housing 24 and is slidable. As the top end 30 of the
control stick 32 is moved horizontally, the plate 40 shifts in tandem
causing the protruding button 46 of the plate 40 to make corresponding
movements at the recess 48 below the opening 26 of the housing 24. The
plate 40 is constrained between the opening 26 and the four horizontal
sensors 30 so it will not move when the control stick 32 is depressed.
The control stick 32 further comprises a circular base 50 installed on the
bottom end 36 of the control stick 32, and the circular plate 40 comprises
a correspondent circular recess 52 below its center. The circular recess
52 of the circular plate 40 is mounted on the circular base 50 of the
control stick 32. Horizontal movement of the top end 34 of the control
stick 32 causes the circular base 50 to move plate 40 accordingly. This
allows the triggering of the four horizontal sensors 30 and subsequent
detection of horizontal movements of the control stick 32.
Please refer to FIG. 5. FIG. 5 is a functional block diagram of the mouse
10 shown in FIG. 1. The mouse 10 comprises a vertical sensor 28, four
horizontal sensors 30, two optical sensors 54 and 56, and a control device
60. The control device 60 uses the vertical sensor 28 to detect vertical
movements of the control stick 28 to generate correspondent vertical
signals and uses the four horizontal sensors 30 to detect horizontal
movements of the control stick 32 to generate correspondent horizontal
signals. It also uses the two optical sensors 54 and 56 to detect
movements of the rotatable ball 18 on the bottom side of the mouse 10 in
two mutually perpendicular directions to generate two-dimensional pointing
signals accordingly.
The vertical sensor 28 and the horizontal sensors 30 are on and off
switches. If the vertical sensor 28 is switched off while one of the
horizontal sensors 30 is triggered, the control device 60 will generate a
corresponding horizontal signal causing the image 15 to be continuously
scrolled by the processor 16. When two neighboring horizontal sensors 30
are triggered at the same time, the image 15 will be continuously scrolled
by the processor 16 along a corresponding 45-degree angle.
If the vertical sensor 28 and one of the horizontal sensors 30 are
triggered, the control device 60 will generate a vertical signal and a
corresponding horizontal signal causing the processor 16 to continuously
scroll the image 15 at a high speed. When the vertical sensor 28 along
with two neighboring horizontal sensors 30 are triggered at the same time,
the processor 16 will scroll the image 15 continuously at a high speed
along a corresponding 45-degree angle.
The vertical sensor 28 and the horizontal sensors 30 can be replaced by
strain gauges. Triggering of the strain gauges will cause the control
device 60 to generate corresponding vertical or horizontal signals which
are determined by forces exerted on the strain gauges. These signals will
cause the processor 16 to continuously scroll the screen image 15 in a
horizontal directional movement dictated by the control stick 32 and
characterized by the horizontal signals and scroll speeds generated by the
control device 60.
As compared with the prior art pointing device, the pointing device 20 of
the present invention has a simpler structure and a more compact size.
Moreover, when the screen image 15 is continuously scrolled, the control
stick 32 need only be moved in one direction. Using this method, control
of the pointing device 20 provides comfort and ease of use for the user.
This is in direct contrast to the prior art rolling wheel which must be
moved repeatedly by the user. Furthermore, an ordinary mouse equipped with
the pointing device 20 will show enhanced performance.
Those skilled in the art will readily observe that numerous modifications
and alterations of the device may be made while retaining the teachings of
the invention. Accordingly, the above disclosure should by construed as
limited only by the metes and bounds of the appended claims.
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